Set on the clearly-translated-from-Japanese Blood Edward Island, Another Code: Two Memories is about 14-year-old heroine Ashley's attempt to uncover her mysterious past after receiving a package from her presumed-dead father which leads her to a desert island. This is done with the help of the ghostly D, whose memories you need to reconstruct through the time-honoured medium of puzzle-solving and examining everything you find in each area. This works by using the stylus to tap things that look interesting and trigger simple conversations between characters, as well as all sorts of trickery involving the DS itself. There are minor irritations and countless ways to get painfully, head-bangingly stuck, but overall Two Memories is an unusual and atmospheric adventure that joins a growing list of genuinely inventive titles for the DS.

· Nintendo, £30

Halo 2 Multiplayer Map Pack XBox

Regular Halo 2 players (and, judging by the constantly bulging servers on Xbox Live, there are rather a lot of them) will already have found their way round all the multiplayer maps, learnt the locations of all the guns, grenades and invisibility shields and proceeded to ruin the fun for all their friends. To help level the playing field briefly, the Halo 2 Multiplayer Map Pack contains the four new levels drip-fed to online players over the past few months, as well as five totally unseen areas. It also updates your Xbox with the slightly rebalanced weaponry that Live players will already be enjoying, which, at £15, is an essential purchase for Halo 2 warriors lacking an internet connection.